Necrosis (from the Greek νεκρός, "dead") is the premature death of cells and living tissue. Necrosis is caused by external factors, such as infection, toxins, or trauma. This is in contrast to apoptosis, which is a naturally occurring cause of cellular death. While apoptosis often provides beneficial effects to the organism, necrosis is almost always detrimental, and can be fatal. Cells which die due to necrosis do not usually send the same chemical signals to the immune system that cells undergoing apoptosis do. This prevents nearby
Old Lady with severe abdominal pain and Constipation
12 years ago
